Brake operating mechanism



y 25, 1933- v H. E. BARTSCH I r 1,919,184

BRAKE OPERATING MECHANISM Filed July 26 1930 Zia/6771507 E en J entlZBantsclL Patented July 25, 1933 UNITED STATES PA-TE roFF ca' HERBERT E. BABTSCH, O1 CHICAGO, ILLINOIS, ASSIGNOR 1 ATTACHMENT 00., A COBIPOB-ATION 0F ILLINTOIS 'ro nmvnnsAL nnar'r' GEAR I nmxnornm'rnve 110mm]:

" Application and m 26,1930. Serial No. 470,793.

This invention relates to brakes, and more particularly to'brake operating mechanism for railway carsq I One of the] object's'of the invention is the provision of a newand. improved hand brake" lever device that is adapted to, be attached to the end sill of a car for changing the direction of the forceappli'ed to the brake operating tension member; for uickly taking up the slack during the initia operationo the brake; and for applying increased leverage to the brake tension member beneath the car during the final operation of the mechanism in appl ing the brake. p

Anot er object of the invention is the provision of a new and improvedrotat'able lever device for use in brake operating mechanism, whereby the mechanism is. 'self-adjustin for compensating for variations in the lengt of cars on'which the device is employed.

simple in construction, easily'installed, -efli-' cient in operation, and durable.

Other and that is strong and further objects and advantages of the invention will appear, from the followon one end of which is adapted to be rotated by ing description, taken in connection with the accompanying drawing, in which Fig. 1 is a side elevation of one end of a railway car showinggthe invention in position thereon, with parts roken away; 7

Fig. 2 is an end elevation thereof, with parts broken away; i

Fig. 3 is a side elevation-of thesheave segment and lever, somewhat enlarged; V

Fig. 4 is a section on line 1&4 of Fig. 3; and i Fig. 5 is Referring character 10 designates a mi ay freight car mounted the brake operating mechanism designated generally by a section on line 51-5 of Fig. 3.

the character 11 and comprising a casing 12 attached to the end of the car in any suitable manner as by means of the bolts 13. Mounted within the casing 12 is a brake drum indicated at 14 by dotted lines in Fig. 2, which is the brake wheel 15 segment is 'pivotally connecte Another object of theinvention is the pro- 26 tension member to the. drawing, the reference W in the usual manner. Since this mechanism isof the usual or an well known construction, it is not thong t necessary to further illustrate or describe the same.

Suitable means are provided for applying the brakes to the car by operating the wheel 15, as will now be described. A combined sheave segment and lever 16 is pivotally connected to the end'sill 17 in any suit- Iable manner. As shown vided with a bracket 18 extending arms 19 and 20 throu tends apin or shaft 21 on whic having downwardly h which exthe sheave 'se ment 16 is mounted. I

he sheave segment ment 22 havinga peripheral also providedwit lyfand outwardly extending lever arm having an opening 25: therein to which is p the rod tension member 16 comprises a segroove 23. I 0

Attached to the 7 segment 16 is the forward end of a brake 27 which,"as shown, is in the form of a chain or cable. The tension member 27 may be anchored to the sheave segment in any suitable, manner. As shown, the sheave segment is provided with two downwardly extending projections 28 and 29, see Fig. 4, spaced apart a .sufiicient distance to'form a slot to receive one of the links '31 of the brake tension member 27. The projections 28 and 29 are provided above their lower ends with a groove forming a recess .32 of suflicient dimension to receive the link 33 as clearly shown in Figs. 4 and 5 of the drawing. When in operative position, the plane of the link 31 is in the plane of the sheave segment 16; The plane of the next adjacent link 33 is at right angle to the plane of the sheave segment 16 and its inner end is adapted to engage the inner end wall of the recess 32 for anchoring the tension member 27 to the se ment 22. v

A cotter pin or 0t er securing member 34 is adapted to be through the members 28 and 29 above the re-' cess 32 in engagement with the forward end of the link 31 for preventing the removal of it to rotate about said link and yet permit the end sill is proa downwardlower side of the sheave inserted transversely.

edge of the rear portion of the link 33. By inserting the pin above link, wear on the pin is reduced to a minimum. The openin for the pin is located sufliciently above t e lower the segment that there is little or t I no danger of breaking the segment at" said tached at an intermediate portion tion of the brakes power is applied. g

he shape of the segment 16 is such that the cable or chain 27 opening. 1

Any suitable means may be provided 'for attaching'the lever tension means'and rod 26 t the drum 14. As shown, of the member 26 is attached to a clevis within which a reversible lever 35 is pivoted. A cable or chain 36 hasits-upper end anchored to the casing 12 as at 3 and is atto the reversible lever 35 as .at 38. The lever 35 is provided with a peripheral groove 39 and the chain 36 extends in this groove about the lever 35 and the upper-end 24 will be substantially in the position shown on the drawing so that upon the initial a plication of the brakes these two levers W1ll be operated to rapidly take up the slack,

after which thelever 35 will have reversed and the lever 24 will have assumed a position more nearly at right angles'to the tension member 26 whereby upon final applicathemaximum amount of approaches closer and closer to the pivot 21 as the segment rotates,

m-applying thebra'kes,and during this time the arm 24; will become more nearly horizontal whereby. itwill I afford its maximum leverage during the final operation in applyingthe brakes, and will rotate the segment 16 rapidly to take up the slack during the initial operation of the brake operating mechanism.

With the present lever 24. If th has itsupper end attached to the drum '14, in the usual manner. The parts are so constructed that the levers 35 and periphery and having a arm to which an operating member is adapted to. be connected,

slot and above the In order to compensate for variation in the lengths of cars, it is common practice to provide turnbuckles in the brake operating rods for lengthening or shortening the same. invention the necessity for lengtheningand shortening the brake operating tension member is taken 'care of by the car is slightly over length the lever-1111x124 will occupy a lower position when the-slack is taken up than when the car is slightly under length. In other words, this variationinlength is compensated for by a change in the position of the lever.

his is considered an important feature of the invention becauseit renders the brake operating mechanism selfiadjusting. I claim as my invention:

In a railway brake, a lever comprising a segmental portion and a bearing opposite the segmental portion about-Which the lever is adapted to turn while in use, said segmental portion being provided with a groove in its forwardly extending said arm being provided with a slot, the bottoinwall a continuation of the being closed at its rear end except for the first-named slot and open at its forward end, said slots adapted to receive two adjacent links of a brake operatingchain for anchoring the chain to said arm, said arm being provided with an opening adjacent to but in advance of the closed end of said last named outermost of said two ad Jacent links for receiving a pin for contacting the link of the bra e operatmgchain that engages the first named slot to prevent its disengagement from said arm.

1 HERBERT E} BARTSCH.

ofwhich constitutes bottom wall of said groove and having a slot transverseto said first mentioned slot,gsaid last named slot 

